A researcher in visual perception who studied how observers judge surface reflectance under different illumination. Experiments compared judgments under natural and altered lighting statistics. They reveal why judging a material property requires interpretation of the scene: the light reaching the eye depends jointly on the surface and its illumination.[ref]
Real-world illumination and the perception of surface reflectance properties by Roland W. Fleming and others. 2003, reflectance matching and illumination manipulations
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